Prismacolor pencils, because of their greasy texture, tend to slip out of the wooden body, leaving you with just the point to use, pretty much like charcoal drawing... But it's the type of pencils that goes over black pens and Grey copics with the same intensity of white. So it works for me.

Thanks man. Amazingly, my kids, of course, Never use their white crayon every time they are getting a box of Prismacolor. I must have of bunch of those around for the grab. I'll hunt down some White uniball too.